/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem05_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 10:46:31,355 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 10:46:31,360 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 10:46:31,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 10:46:31,403 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 10:46:31,405 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 10:46:31,407 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 10:46:31,409 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 10:46:31,411 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 10:46:31,413 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 10:46:31,414 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 10:46:31,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 10:46:31,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 10:46:31,417 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 10:46:31,419 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 10:46:31,420 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 10:46:31,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 10:46:31,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 10:46:31,432 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 10:46:31,435 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 10:46:31,437 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 10:46:31,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 10:46:31,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 10:46:31,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 10:46:31,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 10:46:31,456 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 10:46:31,457 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 10:46:31,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 10:46:31,462 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 10:46:31,463 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 10:46:31,463 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 10:46:31,464 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 10:46:31,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 10:46:31,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 10:46:31,467 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 10:46:31,467 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 10:46:31,468 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 10:46:31,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 10:46:31,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 10:46:31,469 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 10:46:31,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 10:46:31,471 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 10:46:31,498 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 10:46:31,498 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 10:46:31,500 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 10:46:31,500 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 10:46:31,500 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 10:46:31,501 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 10:46:31,501 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 10:46:31,501 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 10:46:31,501 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 10:46:31,502 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 10:46:31,502 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 10:46:31,502 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 10:46:31,502 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 10:46:31,502 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 10:46:31,503 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 10:46:31,503 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 10:46:31,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 10:46:31,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 10:46:31,503 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 10:46:31,504 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 10:46:31,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 10:46:31,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 10:46:31,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 10:46:31,505 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 10:46:31,505 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 10:46:31,505 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 10:46:31,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 10:46:31,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 10:46:31,506 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 10:46:31,506 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 10:46:31,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 10:46:31,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 10:46:31,986 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 10:46:31,987 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 10:46:31,988 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 10:46:31,989 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem05_label31.c [2020-10-28 10:46:32,084 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/91b4db465/ae860342b1874cf0b347692f10938393/FLAG71ec67949 [2020-10-28 10:46:33,175 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 10:46:33,175 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem05_label31.c [2020-10-28 10:46:33,215 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/91b4db465/ae860342b1874cf0b347692f10938393/FLAG71ec67949 [2020-10-28 10:46:33,465 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/91b4db465/ae860342b1874cf0b347692f10938393 [2020-10-28 10:46:33,468 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 10:46:33,475 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 10:46:33,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 10:46:33,477 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 10:46:33,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 10:46:33,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:46:33" (1/1) ... [2020-10-28 10:46:33,487 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56dbb132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:46:33, skipping insertion in model container [2020-10-28 10:46:33,487 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:46:33" (1/1) ... [2020-10-28 10:46:33,496 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 10:46:33,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 10:46:36,207 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:46:36,218 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 10:46:37,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:46:37,585 INFO L208 MainTranslator]: Completed translation [2020-10-28 10:46:37,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:46:37 WrapperNode [2020-10-28 10:46:37,586 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 10:46:37,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 10:46:37,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 10:46:37,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 10:46:37,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:46:37" (1/1) ... [2020-10-28 10:46:37,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:46:37" (1/1) ... [2020-10-28 10:46:37,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:46:37" (1/1) ... [2020-10-28 10:46:37,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:46:37" (1/1) ... [2020-10-28 10:46:38,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:46:37" (1/1) ... [2020-10-28 10:46:38,152 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:46:37" (1/1) ... [2020-10-28 10:46:38,212 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:46:37" (1/1) ... [2020-10-28 10:46:38,292 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 10:46:38,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 10:46:38,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 10:46:38,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 10:46:38,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:46:37" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 10:46:38,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 10:46:38,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 10:46:38,461 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 10:46:38,461 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 10:46:38,461 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 10:46:38,461 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 10:46:38,461 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 10:46:38,462 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-28 10:46:38,462 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-28 10:46:38,462 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output7 [2020-10-28 10:46:38,463 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output8 [2020-10-28 10:46:38,463 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 10:46:38,463 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 10:46:38,463 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 10:46:38,463 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 10:46:38,464 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 10:46:38,464 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-28 10:46:38,465 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-28 10:46:38,465 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output7 [2020-10-28 10:46:38,465 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output8 [2020-10-28 10:46:38,466 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 10:46:38,466 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 10:46:38,466 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 10:46:38,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 10:46:38,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 10:46:38,466 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 10:46:38,467 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 10:46:38,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 10:46:38,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 10:46:38,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 10:46:38,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 10:46:38,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 10:46:38,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 10:46:49,057 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 10:46:49,057 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 10:46:49,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:46:49 BoogieIcfgContainer [2020-10-28 10:46:49,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 10:46:49,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 10:46:49,070 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 10:46:49,073 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 10:46:49,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:46:33" (1/3) ... [2020-10-28 10:46:49,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52accb0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:46:49, skipping insertion in model container [2020-10-28 10:46:49,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:46:37" (2/3) ... [2020-10-28 10:46:49,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52accb0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:46:49, skipping insertion in model container [2020-10-28 10:46:49,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:46:49" (3/3) ... [2020-10-28 10:46:49,078 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label31.c [2020-10-28 10:46:49,091 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 10:46:49,099 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 10:46:49,114 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 10:46:49,167 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 10:46:49,167 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 10:46:49,167 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 10:46:49,168 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 10:46:49,168 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 10:46:49,168 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 10:46:49,168 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 10:46:49,168 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 10:46:49,240 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states. [2020-10-28 10:46:49,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1688 [2020-10-28 10:46:49,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:46:49,402 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:46:49,403 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:46:49,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:46:49,422 INFO L82 PathProgramCache]: Analyzing trace with hash -499540783, now seen corresponding path program 1 times [2020-10-28 10:46:49,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:46:49,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622401834] [2020-10-28 10:46:49,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:46:50,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:46:50,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:46:55,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:46:55,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1711 [2020-10-28 10:46:55,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:46:55,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5189 [2020-10-28 10:46:55,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:46:55,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:46:55,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 10:46:55,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:46:55,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1702 [2020-10-28 10:46:55,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 10:46:57,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:46:57,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:46:57,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:46:57,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:46:57,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:46:57,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:46:57,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 10:46:57,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:46:57,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:46:57,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:46:57,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:46:57,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:46:57,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:47:01,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:47:01,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622401834] [2020-10-28 10:47:01,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:47:01,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 10:47:01,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223557442] [2020-10-28 10:47:01,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:47:01,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:47:01,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:47:01,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:47:01,333 INFO L87 Difference]: Start difference. First operand 2226 states. Second operand 5 states. [2020-10-28 10:47:36,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:47:36,461 INFO L93 Difference]: Finished difference Result 8269 states and 15670 transitions. [2020-10-28 10:47:36,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 10:47:36,464 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1687 [2020-10-28 10:47:36,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:47:36,543 INFO L225 Difference]: With dead ends: 8269 [2020-10-28 10:47:36,543 INFO L226 Difference]: Without dead ends: 5975 [2020-10-28 10:47:36,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:47:36,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5975 states. [2020-10-28 10:47:36,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5975 to 5839. [2020-10-28 10:47:36,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5839 states. [2020-10-28 10:47:36,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5839 states to 5839 states and 10172 transitions. [2020-10-28 10:47:36,955 INFO L78 Accepts]: Start accepts. Automaton has 5839 states and 10172 transitions. Word has length 1687 [2020-10-28 10:47:36,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:47:36,964 INFO L481 AbstractCegarLoop]: Abstraction has 5839 states and 10172 transitions. [2020-10-28 10:47:36,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:47:36,964 INFO L276 IsEmpty]: Start isEmpty. Operand 5839 states and 10172 transitions. [2020-10-28 10:47:37,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1700 [2020-10-28 10:47:37,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:47:37,136 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:47:37,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 10:47:37,137 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:47:37,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:47:37,139 INFO L82 PathProgramCache]: Analyzing trace with hash -488349227, now seen corresponding path program 1 times [2020-10-28 10:47:37,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:47:37,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73237936] [2020-10-28 10:47:37,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:47:37,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:47:37,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:47:37,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:47:42,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:47:42,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1725 [2020-10-28 10:47:42,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:47:42,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5098 [2020-10-28 10:47:42,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:47:42,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:47:42,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:47:42,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:47:42,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 10:47:42,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:47:42,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:47:42,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:47:42,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:47:43,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:47:43,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:47:43,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:47:43,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 10:47:43,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:47:43,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:47:43,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:47:43,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:47:43,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:47:43,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:47:43,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:47:43,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:47:43,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:47:43,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:47:43,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:47:43,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:47:43,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-28 10:47:43,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:47:43,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:47:43,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:47:43,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:47:43,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 10:47:43,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:47:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:47:44,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73237936] [2020-10-28 10:47:44,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:47:44,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:47:44,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265166598] [2020-10-28 10:47:44,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:47:44,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:47:44,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:47:44,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:47:44,435 INFO L87 Difference]: Start difference. First operand 5839 states and 10172 transitions. Second operand 7 states. [2020-10-28 10:48:14,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:48:14,742 INFO L93 Difference]: Finished difference Result 17232 states and 30539 transitions. [2020-10-28 10:48:14,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:48:14,743 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1699 [2020-10-28 10:48:14,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:48:14,814 INFO L225 Difference]: With dead ends: 17232 [2020-10-28 10:48:14,814 INFO L226 Difference]: Without dead ends: 11399 [2020-10-28 10:48:14,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:48:14,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11399 states. [2020-10-28 10:48:15,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11399 to 11273. [2020-10-28 10:48:15,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11273 states. [2020-10-28 10:48:15,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11273 states to 11273 states and 17395 transitions. [2020-10-28 10:48:15,221 INFO L78 Accepts]: Start accepts. Automaton has 11273 states and 17395 transitions. Word has length 1699 [2020-10-28 10:48:15,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:48:15,222 INFO L481 AbstractCegarLoop]: Abstraction has 11273 states and 17395 transitions. [2020-10-28 10:48:15,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:48:15,222 INFO L276 IsEmpty]: Start isEmpty. Operand 11273 states and 17395 transitions. [2020-10-28 10:48:15,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1711 [2020-10-28 10:48:15,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:48:15,284 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:48:15,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 10:48:15,285 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:48:15,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:48:15,287 INFO L82 PathProgramCache]: Analyzing trace with hash 635791837, now seen corresponding path program 1 times [2020-10-28 10:48:15,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:48:15,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988806658] [2020-10-28 10:48:15,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:48:15,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:48:15,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:48:15,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:48:16,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:48:20,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:48:20,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1738 [2020-10-28 10:48:20,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:48:20,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-28 10:48:20,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:48:20,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:48:20,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:48:20,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:48:20,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 10:48:20,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:48:21,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:48:21,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:48:21,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:48:21,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:48:21,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:48:21,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:48:21,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 10:48:21,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:48:21,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:48:21,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:48:21,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:48:21,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:48:21,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:48:21,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:48:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:48:21,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:48:21,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:48:21,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 10:48:21,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:48:21,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-28 10:48:21,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:48:21,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:48:21,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:48:21,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:48:21,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 10:48:21,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:48:21,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-28 10:48:21,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:48:21,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:48:21,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:48:21,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:48:21,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:48:21,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 10:48:21,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:48:21,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:48:21,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:48:21,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-28 10:48:21,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:48:21,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:48:23,049 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 10:48:23,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988806658] [2020-10-28 10:48:23,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:48:23,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:48:23,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854598846] [2020-10-28 10:48:23,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:48:23,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:48:23,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:48:23,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:48:23,055 INFO L87 Difference]: Start difference. First operand 11273 states and 17395 transitions. Second operand 7 states. [2020-10-28 10:48:56,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:48:56,932 INFO L93 Difference]: Finished difference Result 34208 states and 54986 transitions. [2020-10-28 10:48:56,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:48:56,933 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1710 [2020-10-28 10:48:56,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:48:57,038 INFO L225 Difference]: With dead ends: 34208 [2020-10-28 10:48:57,039 INFO L226 Difference]: Without dead ends: 22941 [2020-10-28 10:48:57,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:48:57,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22941 states. [2020-10-28 10:48:57,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22941 to 22426. [2020-10-28 10:48:57,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22426 states. [2020-10-28 10:48:57,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22426 states to 22426 states and 31182 transitions. [2020-10-28 10:48:57,892 INFO L78 Accepts]: Start accepts. Automaton has 22426 states and 31182 transitions. Word has length 1710 [2020-10-28 10:48:57,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:48:57,893 INFO L481 AbstractCegarLoop]: Abstraction has 22426 states and 31182 transitions. [2020-10-28 10:48:57,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:48:57,893 INFO L276 IsEmpty]: Start isEmpty. Operand 22426 states and 31182 transitions. [2020-10-28 10:48:57,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1722 [2020-10-28 10:48:57,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:48:57,984 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:48:57,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 10:48:57,984 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:48:57,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:48:57,986 INFO L82 PathProgramCache]: Analyzing trace with hash -457283660, now seen corresponding path program 1 times [2020-10-28 10:48:57,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:48:57,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175786689] [2020-10-28 10:48:57,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:48:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:48:58,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:48:58,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:48:58,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:49:03,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:49:03,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1749 [2020-10-28 10:49:03,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:49:03,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 10:49:03,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:49:03,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:49:03,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 10:49:03,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:49:03,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 10:49:03,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:49:03,870 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-28 10:49:03,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:49:03,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:49:03,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:49:03,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:49:03,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:49:03,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:49:03,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 10:49:03,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:49:03,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:49:03,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:49:03,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:49:03,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:49:03,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:49:03,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:49:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:49:03,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:49:03,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:49:04,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:49:04,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 10:49:04,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:49:04,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-28 10:49:04,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:49:04,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:49:04,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:49:04,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:49:04,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 10:49:04,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:49:04,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-28 10:49:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:49:04,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:49:04,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:49:04,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:49:04,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:49:04,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 10:49:04,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:49:04,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:49:04,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:49:04,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:49:04,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 10:49:04,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:49:05,618 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 10:49:05,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175786689] [2020-10-28 10:49:05,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:49:05,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:49:05,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291240109] [2020-10-28 10:49:05,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:49:05,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:49:05,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:49:05,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:49:05,623 INFO L87 Difference]: Start difference. First operand 22426 states and 31182 transitions. Second operand 7 states. [2020-10-28 10:49:36,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:49:36,003 INFO L93 Difference]: Finished difference Result 56650 states and 85428 transitions. [2020-10-28 10:49:36,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:49:36,009 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1721 [2020-10-28 10:49:36,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:49:36,286 INFO L225 Difference]: With dead ends: 56650 [2020-10-28 10:49:36,286 INFO L226 Difference]: Without dead ends: 34230 [2020-10-28 10:49:36,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:49:36,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34230 states. [2020-10-28 10:49:37,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34230 to 33892. [2020-10-28 10:49:37,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33892 states. [2020-10-28 10:49:37,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33892 states to 33892 states and 48529 transitions. [2020-10-28 10:49:37,310 INFO L78 Accepts]: Start accepts. Automaton has 33892 states and 48529 transitions. Word has length 1721 [2020-10-28 10:49:37,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:49:37,311 INFO L481 AbstractCegarLoop]: Abstraction has 33892 states and 48529 transitions. [2020-10-28 10:49:37,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:49:37,311 INFO L276 IsEmpty]: Start isEmpty. Operand 33892 states and 48529 transitions. [2020-10-28 10:49:37,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1728 [2020-10-28 10:49:37,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:49:37,459 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:49:37,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 10:49:37,460 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:49:37,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:49:37,461 INFO L82 PathProgramCache]: Analyzing trace with hash -2102827550, now seen corresponding path program 1 times [2020-10-28 10:49:37,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:49:37,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143246047] [2020-10-28 10:49:37,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:49:37,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:49:37,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:49:38,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:49:42,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:49:42,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1753 [2020-10-28 10:49:42,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:49:42,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5067 [2020-10-28 10:49:42,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:49:42,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:49:42,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:49:42,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:49:42,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 10:49:42,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:49:43,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:49:43,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:49:43,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:49:43,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:49:43,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:49:43,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:49:43,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 10:49:43,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:49:43,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:49:43,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:49:43,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:49:43,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:49:43,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:49:43,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:49:43,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:49:43,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:49:43,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:49:43,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 10:49:43,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:49:43,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-28 10:49:43,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:49:43,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:49:43,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:49:43,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:49:43,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 10:49:43,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:49:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:49:44,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143246047] [2020-10-28 10:49:44,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:49:44,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 10:49:44,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479340579] [2020-10-28 10:49:44,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 10:49:44,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:49:44,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 10:49:44,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:49:44,458 INFO L87 Difference]: Start difference. First operand 33892 states and 48529 transitions. Second operand 8 states.